Hydraulic transportation system

ABSTRACT

A system is provided for hydraulic transportation of waste solids, whereby the solids may be introduced into a by-pass line off a main duct, whereby the solids are introduced into a chamber after discontinuing the flow of water through the by-pass line, with the solids either being introduced into a chamber directly in the by-pass line, or into a chamber connected thereto for subsequent introduction into the by-pass line. In the latter situation, a pusher of the piston type may be utilized. Valves are used to discontinue the flow to the chamber, and to open a solids inlet to the chamber, with the valves then being actuated to close the solids inlet and to open the chamber to the flow of water. In those instances wherein the chamber forms a part of the by-pass line, the water may then carry off the waste. In those instances wherein the chamber does not form a part of the by-pass line but communicates therewith, the pusher is then utilized to push the solids into the by-pass line. This procedure is then followed by the extraction of water from the chamber.

United States Patent Craig [45] Apr. 4, 1972 1 HYDRAULIC TRANSPORTATIONAB TRACT SYSTEM A system is provided for hydraulic transportation ofwaste 72 l t I S N. C D P solids, whereby the solids may be introducedinto a by-pass 1 men or am ralg even a line off a main duct, whereby thesolids are introduced into a [73] Assignee: Wascon Systems, Inc.,Hatboro, Pa. chamber after discontinuing the flow of water through thebypass line, with the solids either being introduced into a [22] Flled'1970 chamber directly in the by-pass line, or into a chamber con- [21]Appl. No.: 16,501 nected thereto for subsequent introduction into theby-pass line. In the latter situation, a pusher of the piston type maybe utilized. Valves are used to discontinue the flow to the [22] :J.S.C(iI ..302/l5 Chamber, and to open a solids inlet to the chamber with{he 5 f valves then being actuated to close the solids inlet and to open1 0 l l l the chamber to the flow of water. In those instances whereinthe chamber forms a part of the by-pass line, the water may [56]References cued then carry off the waste. In those instances wherein theUNITED STATES PATENTS chamber does not form a part of the by-pass linebut communicates therewith, the pusher is then utilized to push thesolids 2,621,156 12/1952 Farrell ..302/15 into the by-pass line. Thisprocedure is then followed by the 1,618,395 2/1927 Ward extraction ofwater from the chamber. 3,178,233 4/1965 Bredthauer ..302/16 PrimaryExaminer-Even C. Blunk Assistant Examiner-Hadd S. Lane AttorneyPaul &Paul W i kin D wi Fiesta PATENTEDAPR 4 I972 SHEET 1 [IF 2 INVENTOR. SumN. Craig mkfiwl ATTORN EYS PATENTEDAFR 4 m2 SHEET 2 OF 2 INVENTOR. SumN. Craig ATTORNEYS.

HYDRAULIC TRANSPORTATION SYSTEM BACKGROUND OF THE INVENTION In thepresent day household, more and more items such as food stufi's,commodities and the like are purchased in packaged form, therebycreating increased waste material in households, which must be disposedof.

Present day waste disposal techniques, for the most part, include thedoor-to-door collection of trash which is becoming increasinglyexpensive, with increased labor and other costs. Also, the problem ofbacteria formation with garbage, trash and the like remains present, andin fact increases with the quantity of trash and garbage that need becollected from households and the like in any given community. Thisproblem is particularly true in urban areas wherein a greater populationdensity magnifies the trash accumulation problem and consequentlymagnifies the trash pick-up problem.

It has been recognized that it would be desirable to have some automaticdisposal system for use at individual households, or other places oftrash generation. However, calized trash pulping and grinding inindividual households and the like for the most part becomesprohibitively expensive, for most households having normal trashaccumulation problems. Even so, should a given site of trash generationhave a sufficient quantity of trash generated as to warrant a pulping ortrash compacting apparatus on the premises, there still remains theproblem of collecting such condensed trash, even on a less frequentbasis.

SUMMARY OF THE INVENTION The present invention is directed towardovercoming the above, and other problems, in providing a hydraulictransportation system for waste conveying, that is adaptable to anentire community, wherein a main trash disposal duct is utilized bynumerous households, or other locations of trash accumulation, andwherein each such situs of trash accumulation is provided with anapparatus for introducing trash into a pipe line, for carrying OK thetrash. A by-pass line is utilized, with valves for terminating the flowof water in such by-pass line under an arrangement that permitsintroduction of trash into the by-pass line, with such valves then beingopened to permit flow of water and trash thus introduced into theby-pass line, into the main disposal duct or conduit.

Accordingly, it is a primary object of this invention to provide a novelhydraulic transportation system for waste conveyance, utilizing a mainduct, having one or more by-pass conduit lines, each with means forintroducing solids into such by-pass conduit line.

It is a further object of this invention to accomplish the above object,utilizing novel trash introduction means, particularly valve devices foropening an inlet into such by-pass conduit line and for closing off thewater supply through such by-pass conduit line.

It is a further object of this invention to provide trash inlet means asset forth in the objects immediately above, wherein the trash isintroduced directly in the by-pass line.

It is yet another object of this invention to provide a novel hydraulictransportation system, wherein, in addition to utilizing valves whichselectively permit entry of trash into a chamber, or water into thechamber, utilizing novel pusher type means for introducing trash fromthe chamber into a bypass line of a central trash disposal duct, to becarried off by water running through the by-pass line into the centralduct.

Other object and advantages of the present invention will be readilyapparent to those skilled in the art from a reading of the followingbrief description of the drawing figures, detailed descriptions of thepreferred embodiments, and the appended claims.

IN THE DRAWINGS FIG. 1 is a diagrammatic perspective view of a portionof a hydraulic transportation system in accordance with this invention,wherein a single trash inlet location is illustrated, along with basicoperational components therefor.

FIG. 2 is a view generally similar to portions of FIG. 1, but wherein analternative means is utilized for introducing trash into a by-pass lineof the main duct.

FIG. 3 is a vertical sectional view through a typical valve utilized inaccordance with the embodiments of FIGS. 1 and 2.

FIG. 4 is a vertical sectional view taken through a portion of amodified form of a hydraulic transportation system.

Referring now to the drawings in detail, reference is first made to FIG.1, wherein there is illustrated a main water duct generally designatedby the numeral 10, that would comprise the main duct for a community orthe like, for conveying waste solids from a plurality of residences,stores or the like thereof. The main duct 10 would comprise a largepressure tight pipe, for example, of 3 feet or greater in diameter, thatwould normally run down the center of the street in a given community.,The duct 10 is pressurized for carrying water therethrough at apressure of approximately 50 pounds per square inch. This duct 10 wouldnormally be running full of water at all times.

A reduced diameter pipe section 11 would be provided, as a means forcreating a pressure drop between upstream and downstream pipe sections12 and 13 respectively.

The reduced diameter section 11 may comprise a zone of reduced interiorpipe cross-section, or a throat, which would restrict the passage ofwater through the pipe 10, to create the high pressure in the upstreamend 12 of the pipe, which high pressure would prevail in water conveyedthrough a by-pass conduit 14, to facilitate introduction of the highpressure water into the lower pressure section 13 of the pipe 11, at apoint located at predetermined distance from the throat 11 that wouldfacilitate the re-entry of high pressure water into the pipe 13.

The by-pass conduit 14 may comprise piping for example of 18 inchdiameter.

A pair of valves 15 and 16 are located in the conduit 14, each suchvalve being constructed in any desired manner, but preferably along thelines of one illustrated in FIG. 3. In FIG. 3, a gate valve isillustrated, comprising a housing 17 to which is connected the conduit14, on opposite sides thereof, with the housing also having a gate 18slidable therein, to completely close off a section of the conduit 14,when in the position illustrated in FIG. 3. The gate 18 is carried on arod 20 and is spring-biased by means of a spring 21 in the downwardposition illustrated in FIG. 3. The gate 18 is movable upwardly, asindicated by the arrow 22 of FIG. 2, against the force of the spring 21,to open the passageway 23 of the conduit 14 through the valve 15, whenactuated by means of a solenoid 24, or the like.

The zone 25 of the conduit 14 as located between the valves 15 and 16,comprises a chamber in its interior, that communicates with an inletline or duct 26, across the valve'27, which valve 27 is also constructedgenerally in the manner illustrated in FIG. 3. The duct 26 may have aconical inlet 29 or the like, as desired, and would normally be locatedwith a residence to be served by the system illustrated. A pump 28 isprovided, for clearing water out of the chamber 25, through a line 30,and for interjecting the same into the conduit line 14, on thedownstream side of the chamber 25, through a line 31.

Waste would be placed into the top of the vertical duct 26, in acondition of the system such that all of the valves 15, 16, and 27 areclosed. The homeowner would then actuate the horizontal valve 27,allowing the waste to drop directly into the chamber 25, which would atthis point contain no water. Then, the valve 27 would be closed, andboth lower valves 15 and 16 would be opened, to allow water from theduct 10, which would then have passed into the upstream end of theconduit 14, to flood the chamber 25, thereby washing solid waste intothe downstream side of the conduit 14, and then into the downstreamportion 13 of the duct 10, because of the difference between thepressure of water conveyed through the conduit 14, relative to the lowerpressure in the downstream side 13 of the duct 10, as is effected by theuse of a pressure reducing means such as the constriction 11. After thewaste has been washed by the water from the chamber 25,

the valves 15 and 16 would be actuated by their solenoids to close,trapping water within the chamber 25. The pump 28 would then be actuatedto extract the water from the chamber 25, through the line 30, and tointerject such water through the line 31, back into the downstream sideof the by-pass conduit 14. The upper valve 27 may then be opened toreceive additional waste into the chamber 25.

This system permits entry of waste into a chamber that does not alreadyhave water in the chamber. If the waste that were to be carried away wassufficiently dense that it would immerse itself in water, and did notcontain other items that were lighter in weight than water, such aspaper particles and the like, then there would normally be no problem ofintroducing waste directly into the by-pass duct 14, without the use ofthe valves 15, 16 and 27. However, most waste comprises a heterogeneousmixture of metal, plastics, paper and cardboard components, some ofwhich are lighter than water, and which would not readily be carriedoff, without the use of the arrangement discussed above.

At certain locations along the length of the main duct 10, there may bedisposed various comminuting apparatus, such a pulping tanks asdisclosed in application Ser. No. 580,445, filed Sept. 20th 1966, nowU.S. Pat. No. 3,489,356 which may pulp the solid carried by the mainduct l'into the slurry form, which slurry may then be subsequentlyground, if desired, or may be compressed at some stage, by the use of apress such as that disclosed in U.S. Pat. No. 3,426,677, if desired. Inother instances, it may be desirable to dispose of the solids carriedwithin the main duct 10, directly into a sewage system or the like, ifdesired. However, in most instances, it may be desirable to pulp andcompress the solids carried within the duct 10, at one or more locationsthroughout the community having such a system as that disclosed herein.

Wlth particular reference to FIG. 2, there is illustrated a systemgenerally similar to that of FIG. 1, but wherein an alternative methodis provided for introducing solids into a by-pass conduit 32. Theconduit is provided with an upstream portion 32 which is connectable toa high pressure side of a main duct (not shown) and a downstream section32" which is connected to a low pressure section of a main duct (notshown).

A pipe section 33 is connected in communicating relation with theconduit 32 by means of a piping T 34, with a valve 35, constructedgenerally along the lines of the valve illustrated in FIG. 3, beingdisposed between the T 34 and the chamber 33. A vertical duct 36 isprovided, which passed through another valve 37, which also isconstructed along the lines of that illustrated in FIG. 3, for inlet ofparticles received into a conical hopper 38 or the like, for passingthrough the valve 37 when the same is in an open condition, andvertically downwardly into the chamber 33, as illustrated in FIG. 2.

In the embodiment in FIG. 2, a pump 40 is provided for evacuating waterfrom the chamber 33 through a line 41, and for interjecting the samethrough a line 42, into the downstream section 32" of the by-passconduit 32. A pusher 43 is provided, in the form of a piston 44connected to a rod 45, with the piston 44 being carried within acylinder 46, and with the rod 45 having another piston 47 connected atits opposite end, with the piston 47 being disposed within a cylinder48, and with drive means in a form of pneumatic lines 50 and 51 beingprovided, for receiving a fluid for driving the piston 47 back andforth, as desired, which in turn, will cause the pusher 43 to beactuated such that the piston 42 may traverse the chamber 33, forpushing solids and water disposed therein through the valve 35, anddirectly into the T" section 34 of the by-pass conduit 32.

In the operation of the system illustrated in FIG. 2, all of the valves37 and 35 would normally be closed, when waste is discharged into thevertical duct 36.

The homeowner would then actuate the valve 37, in order to allow wasteto drop into the trash discharge chamber 33. The valve 37 would then beclosed by actuation of its solenoid by any suitable switching devicelocated nearby the point of inlet of trash by the householder, such asthe inlet point 38,

and the valve 35 would then be opened. All this time, water is beingconveyed freely through the by-pass conduit 32. Thus, upon opening ofthe valve 35, water is free to flood the chamber 33, and to mix with thesolids disposed therein. The ram or pusher 43 is then actuated by thepneumatic means illustrated, such that the piston 44 traverses thechamber 33, and passes through the valve 35, to force waste and waterfrom the chamber 33, into the T" 34. The ram is then actuated in areverse manner such that the piston 44 is then withdrawn. As soon as thepiston 44 passes backwardly clear of the valve 35, the valve 35 isclosed and the pump 40 is then actuated by the householder or the like,for evacuating water from the chamber 33 through the line 41, and forinterjecting the same into the downstream section 32" of the duct 32through the line 42. The trash discharge chamber is then ready toreceive trash once again, upon actuation of the valve 37.

Referring now to FOG. 4 in detail, it will be seen that an alternativesystem generally designated by the numeral 60 is provided, with thesystem 60 including a main duct 61 that does not have a pressurereducing throat such as that 11 of FIG. 1. A by-pass conduit 62 isprovided, that is disposed vertically above the main duct 61,approximately at an elevation of two feet thereabove, and with theby-pass conduit 62 being approximately eight feet in length, between itsupstream point of communication 63 with the main duct and its downstreampoint of communication 64 with the main duct.

The by-pass conduit 62 includes a central portion or a chamber 65 thatis disposed substantially parallel to and above the main duct 61, thatis provided with valves 66 and 67, constructed in accordance with theconstruction of FIG. 3, as are the other embodiments of this invention.Also, a valve 68 is provided, for opening and closing a waste inletchute 70 into and out of communication with the chamber 65.

A pump 71 is also provided, having a line 72 for withdrawing waterwithin the chamber 65, when the valves 66 and 67 are closed, and fordelivering water through a line 73, back into a downstream portion ofthe conduit 62, for introduction into the main duct 61. The operation ofthe valves 66, 67, 68 and the pump 71, as well as the general operationof the system 60 by a householder, for introducing waste to be discardedinto the chute 70, is identical with that set forth above with respectto the system of FIG. 1, so the same will not be repeated in detailhere.

The system 60 of FIG. 4 is constructed to eliminate the need for apressure reducing means of the throat type, for causing water to beintroduced into the by-pass conduit 62. The bypass conduit 62 is locatedclose the main duct 61, and although the same is illustrated as beingdisposed vertically above the duct 61, such is for exemplary purposesonly, such disposition of the conduit 62 being not necessary. However,such disposition is preferable, and the distance of the main portion ofthe conduit 62, and especially that portion comprising the chamber 65,would be located within a predetermined distance from the main duct 61,so that the head (approximately ten to forty feet of pressure) in themain duct 61, at the point 63 of inlet communication with the by-passconduit 62 will be sufficient to provide flow through the conduit 62,and

back into the main duct 61, at the desired velocity. It is con- 7ceivable, that should the distance between the major central portion ofthe conduit 62 and the main duct 61 become too great, there would be agreat pressure drop in the conduit 62 on the downstream side of thechamber 65, that may create some difficulty in reinjecting the waste andwater back into the main duct 61 through the conduit outlet 64. However,by maintaining the distance between the main duct 61 and the chamber 65of the conduit 62 to a minimum, and in any event, less than the maximumdistance that would permit the minimum velocity flow through the conduit62, for purposes of waste removal from the chamber 65, for a givenpreselected capacity of the pump or other means which supplies thepressure at the point of inlet 63, it is possible to rely upon the headpressure within the main duct 61, for sweeping the by-pass conduit 62,and waste disposed therein, such head also facilitating the re-entxy ofwater and any waste back into the main duct 61, without reliance upon apressure reducing means, such as a throat.

Accordingly, a pump 74 is provided, for supplying water from a suitablesource 75, and being selected to have a capacity to deliver the desiredhead or pressure at any and each bypass conduit inlet location 63.

It will be apparent that a single main duct 61 would ordinarily beutilized to provide flow at the desired pressure for a plurality ofby-pass conduits, as for example, under a residential community, whereinthe main duct 61 may be run beneath the houses at a given depth, withthe by-pass conduits 62 being disposed above the main duct 61, butlocated also beneath the houses, thereby eliminating the necessity forextensive piping, as for example, inwardly from a street to the locationof a residence.

It will also be apparent, that if there is noticeable pressure dropwithin the loop or by-pass conduit 62, the re-entry of water from theconduit 62 into the main duct 61 may be facilitated by a partial venturieffect, or partial vacuum caused by the passage of water across theopening 64, through the main duct 61, that has not been reducednoticeable in pressure, with the resultant partial vacuum or venturiassisting the inflow of water from the conduit 62, through the opening64, into the main duct 61. However, the venturi effect is generallyinsignificant in the arrangement of FIG. 4, relative to the velocityimpact of water within the conduit 62, which is at a sufficiently highvelocity due to the relatively short distance separating the conduit 62and the main duct 61, to move dense material out of the chamber 65, andinto the main duct 61.

It will be apparent from the foregoing that various modifications may bemade in the details of construction, and in the details of operation ofthe various components of the system illustrated herein. Also, variousmodifications may be made in the manner of utilization of the system setforth herein, all within the spirit and scope of the invention asdefined in the appended claims.

What is claimed is:

l. A hydraulic transportation system for waste conveyance comprising amain duct for conveying solids therethrough in a pressurized watermedium with means for creating a pressure drop in the main duct from ahigh pressure at a first location to a lower pressure at a secondlocation downstream of said first location, a by-pass conduit having aninlet communicating with said main duct at said first location and anoutlet communicating with said duct at said second location and beingcoextensive between said locations, and means for introducing solidsinto said by-pass conduit from outside thereof, wherein said by-passconduit includes a chamber located in line therewith between said inletand said outlet, for receiving waste solids therein and means forflooding said chamber with high pressure water carried in said by-passconduit, with said introducing means also including delivery means beingprovided for delivering waste solids into said chamber, and valve meansas part of said flooding means, actuatable to maintain in shut-offcondition the supply of water into said chamber from said by-passconduit while said delivery means to said chamber is open forintroduction of solids into said chamber and to maintain shut saiddelivery means after passage of solids into said chamber and while waterfrom said by-pass conduit is permitted to flood said chamber and carryoff solids through said by-pass conduit to said main duct, wherein saidchamber is provided with pump type evacuation means for evacuating watertrapped therein after closing of said valve means in such a manner as toshut off water flow through said by-pass conduit, and for delivering thewater thus evacuated into the by-pass conduit, on the downstream side ofthe chamber.

2. A hydraulic transportation system for waste conveyance comprising amain duct for conveying solids therethrough in a pressurized watermedium with means for creating a pressure drop in the main duct from ahigh pressure at a first location to a lower pressure at a secondlocation downstream of said first location, a by-pass conduit having aninlet communicating with said main duct at said first location and anoutlet communicating with said duct at said second location and beingcoextensive between said locations, and means for introducing solidsinto said bypass conduit from outside thereof, wherein said introducingmeans includes a chamber for receiving waste solids therein and meansfor flooding said chamber with high pressure water carried in saidby-pass conduit, wherein said introducing means includes delivery meansbeing provided for delivering waste solids into said chamber, and valvemeans as part of said flooding means actuatable to maintain said chamberclosed to the water passing through said by-pass conduit while saiddelivery means to said chamber is open for introduction of solids intosaid chamber, and to maintain shut said delivery means when said chamberis open to said by-pass conduit and while water from said by-passconduit is permitted to flood said chamber, said introducing means alsoincluding pusher means in said chamber for pushing solids and water fromsaid chamber into said by-pass conduit while said chamber is open tosaid by-pass conduit.

3. The system of claim 2 wherein said delivery means comprises avertically extending duct adapted for gravity feed of solids into saidchamber from a location of trash disposal.

4. The system of claim 2 wherein said valve means comprises two separatevalves provided with actuation means operable from a point locatedremote from said valve means, near the inlet to said delivery means.

5. The system of claim 2 wherein said pusher means comprises a pistonand means for actuating the piston for traversing said chamber.

6. The system of claim 2 wherein said chamber is provided with pump typeevacuation means for evacuating water trapped therein after closing saidvalve means to shut off communication of said chamber with said by-passconduit, and for delivering the water thus evacuated into said by-passconduit.

7. A hydraulic transportation system for waste conveyance comprising adischarge main, a conduit communicatively connected to said main forcarrying waste thereinto and with means for supplying water to saidconduit, a portion of said conduit being a chamber for receipt of wastetherein through a waste-receiving inlet thereof and with said chamberbeing of substantially the same cross-sectional area as adjacentportions of the conduit at upstream and downstream ends of the chamberwith said conduit being of substantially uniform cross-sectional areathroughout its length, and of lesser crosssectional area than that ofthe main, and means for shutting off the flow of water in the conduitand opening said waste-receiving opening prior to placement of waste inthe chamber through said waste-receiving opening and for resuming theflow of water in the conduit through the chamber and closing saidwaste-receiving opening after placement of waste in the conduit, forsweeping of waste into the main.

8. The system of claim 7 wherein said means for shutting off andresuming water flow and for opening and closing said waste-receivingopening comprise valve means for isolating said chamber from theremainder of said conduit.

9. The system of claim 8, wherein said valve means comprise threeseparate valves provided with actuation means operable from a pointlocated remote from said valve means.

10. The hydraulic transportation system of claim 7, wherein said conduitcomprises a by-pass conduit, with said means for supplying water to saidconduit comprising another communicative connection with said conduitand said main located upstream of said main from said aforementionedconnection of said conduit and said main.

11. The system of claim 10 wherein said by-pass conduit is disposed at agreater vertical elevation than the elevation level of said main andwherein said by-pass conduit has a water-carrying portion that isdisposed in spaced relation to, and substantially parallel to, said ducta predetermined amount that is less than the maximum distance that willpermit minimum velocity flow in both of said main duct and said by-passconduit, for a given preselected capacity of said supplying means.

12. The system of claim 10, including pump means for clearing water fromsaid chamber prior to reception of waste therein.

13. The system of claim 10, including a waste chute connected to saidwaste-receiving opening for facilitating the input of waste thereto.

14. The system of claim 10, including means for creating a pressure dropbetween locations of connection of said by-pass conduit to said main.

15. The system of claim 14, wherein said means for creating a pressuredrop comprise a zone of restricted cross-section of said main.

16. A hydraulic transportation system for waste conveyance comprising awaste discharge main, a conduit communicatively connected to said mainfor carrying waste thereto, a wastereceiving chamber associated withsaid conduit for supplying waste thereto, means for supplying water tosaid chamber, means for shutting off the water supply to the chamberduring placement of waste therein and for resuming the supply of waterto the chamber after placement of waste therein for washing of wastethrough the conduit to the main, and pusher means carried in the chamberfor pushing waste disposed therein into said conduit.

17. A hydraulic transportation system for waste conveyance comprising alongitudinal conduit for carrying liquid therethrough, a chamber openinginto said conduit, a closable waste inlet duct opening into said chamberfor delivery of solid waste thereto, pusher means within said chamberfor traversing said chamber and pushing solid waste into said conduit,means for actuating said pusher means, and means selectively operablefor shutting off liquid communication between said conduit and saidchamber when said duct opening is opened for receipt of waste and forclosing said opening and for permitting liquid communication betweensaid conduit and said chamber for flooding said chamber for facilitatingtransfer of solids from said chamber to said conduit, with thetransverse cross-sectional interior size of said conduit being at leastas great as the cross-sectional interior size of said chamber, asmeasured transverse to the path of movement of said pushing means.

1. A hydraulic transportation system for waste conveyance comprising amain duct for conveying solids therethrough in a pressurized watermedium with means for creating a pressure drop in the main duct from ahigh pressure at a first location to a lower pressure at a secondlocation downstream of said first location, a by-pass conduit having aninlet communicating with said main duct at said first location and anoutlet communicating with said duct at said second location and beingcoextensive between said locations, and means for introducing solidsinto said by-pass conduit from outside thereof, wherein said by-passconduit includes a chamber located in line therewith between said inletand said outlet, for receiving waste solids therein and means forflooding said chamber with high pressure water carried in said by-passconduit, with said introducing means also including delivery means beingprovided for delivering waste solids into said chamber, and valve meansas part of said flooding means, actuatable to maintain in shut-offcondition the supply of water into said chamber from said by-passconduit while said delivery means to said chamber is open forintroduction of solids into said chamber and to maintain shut saiddelivery means after passage of solids into said chamber and while waterfrom said by-pass conduit is permitted to flood said chamber and carryoff solids through said by-pass conduit to said main duct, wherein saidchamber is provided with pump type evacuation means for evacuating watertrapped therein after closing of said valve means in such a manner as toshut off water flow through said bypass conduit, and for delivering thewater thus evacuated into the by-pass conduit, on the downstream side ofthe chamber.
 2. A hydraulic transportation system for waste conveyancecomprising a main duct for conveying solids therethrough in apressurized water medium with means for creating a pressure drop in themain duct from a high pressure at a first location to a lower pressureat a second location downstream of said first location, a by-passconduit having an inlet communicating with said main duct at said firstlocation and an outlet communicating with said duct at said secondlocation and being coextensive between said locations, and means forintroducing solids into said by-pass conduit from outside thereof,wherein said introducing means includes a chamber for receiving wastesolids therein and means for flooding said chamber with high pressurewater carried in said by-pass conduit, wherein said introducing meansincludes delivery means being provided for delivering waste solids intosaid chamber, and valve means as part of said flooding means actuatableto maintain said chamber closed to the water passing through saidby-pass conduit while said delivery means to said chamber is open forintroduction of solids into said chamber, and to maintain shut saiddelivery means when said chamber is open to said by-pass conduit andwhile water from said by-pass conduit is permitted to flood saidchamber, said introducing means also including pusher means in saidchamber for pushing solids and water from said chamber into said by-passconduit while said chamber is open to said by-pass conduit.
 3. Thesystem of claim 2 wherein said delivery means comprises a verticallyextending duct adapted fOr gravity feed of solids into said chamber froma location of trash disposal.
 4. The system of claim 2 wherein saidvalve means comprises two separate valves provided with actuation meansoperable from a point located remote from said valve means, near theinlet to said delivery means.
 5. The system of claim 2 wherein saidpusher means comprises a piston and means for actuating the piston fortraversing said chamber.
 6. The system of claim 2 wherein said chamberis provided with pump type evacuation means for evacuating water trappedtherein after closing said valve means to shut off communication of saidchamber with said by-pass conduit, and for delivering the water thusevacuated into said by-pass conduit.
 7. A hydraulic transportationsystem for waste conveyance comprising a discharge main, a conduitcommunicatively connected to said main for carrying waste thereinto andwith means for supplying water to said conduit, a portion of saidconduit being a chamber for receipt of waste therein through awaste-receiving inlet thereof and with said chamber being ofsubstantially the same cross-sectional area as adjacent portions of theconduit at upstream and downstream ends of the chamber with said conduitbeing of substantially uniform cross-sectional area throughout itslength, and of lesser cross-sectional area than that of the main, andmeans for shutting off the flow of water in the conduit and opening saidwaste-receiving opening prior to placement of waste in the chamberthrough said waste-receiving opening and for resuming the flow of waterin the conduit through the chamber and closing said waste-receivingopening after placement of waste in the conduit, for sweeping of wasteinto the main.
 8. The system of claim 7 wherein said means for shuttingoff and resuming water flow and for opening and closing saidwaste-receiving opening comprise valve means for isolating said chamberfrom the remainder of said conduit.
 9. The system of claim 8, whereinsaid valve means comprise three separate valves provided with actuationmeans operable from a point located remote from said valve means. 10.The hydraulic transportation system of claim 7, wherein said conduitcomprises a by-pass conduit, with said means for supplying water to saidconduit comprising another communicative connection with said conduitand said main located upstream of said main from said aforementionedconnection of said conduit and said main.
 11. The system of claim 10wherein said by-pass conduit is disposed at a greater vertical elevationthan the elevation level of said main and wherein said by-pass conduithas a water-carrying portion that is disposed in spaced relation to, andsubstantially parallel to, said duct a predetermined amount that is lessthan the maximum distance that will permit minimum velocity flow in bothof said main duct and said by-pass conduit, for a given preselectedcapacity of said supplying means.
 12. The system of claim 10, includingpump means for clearing water from said chamber prior to reception ofwaste therein.
 13. The system of claim 10, including a waste chuteconnected to said waste-receiving opening for facilitating the input ofwaste thereto.
 14. The system of claim 10, including means for creatinga pressure drop between locations of connection of said by-pass conduitto said main.
 15. The system of claim 14, wherein said means forcreating a pressure drop comprise a zone of restricted cross-section ofsaid main.
 16. A hydraulic transportation system for waste conveyancecomprising a waste discharge main, a conduit communicatively connectedto said main for carrying waste thereto, a waste-receiving chamberassociated with said conduit for supplying waste thereto, means forsupplying water to said chamber, means for shutting off the water supplyto the chamber during placement of waste therein and for resuming thesupply of water to the chamber after placement of waste therein forwashing of waste through the conduit to the main, aNd pusher meanscarried in the chamber for pushing waste disposed therein into saidconduit.
 17. A hydraulic transportation system for waste conveyancecomprising a longitudinal conduit for carrying liquid therethrough, achamber opening into said conduit, a closable waste inlet duct openinginto said chamber for delivery of solid waste thereto, pusher meanswithin said chamber for traversing said chamber and pushing solid wasteinto said conduit, means for actuating said pusher means, and meansselectively operable for shutting off liquid communication between saidconduit and said chamber when said duct opening is opened for receipt ofwaste and for closing said opening and for permitting liquidcommunication between said conduit and said chamber for flooding saidchamber for facilitating transfer of solids from said chamber to saidconduit, with the transverse cross-sectional interior size of saidconduit being at least as great as the cross-sectional interior size ofsaid chamber, as measured transverse to the path of movement of saidpushing means.